Improvement in grinding-mills



l f1( DONALDSON.

- Homny Machine.

Patented Oct. l5, v1867.

lTO ALL WHOM IT MAY CONCERN:

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JOHN DONALDSON, OF RTCKFORD, ILLINOIS.

Letters .Patent No. 69,903, dated October 15, 1867.

IMPROVEMENT IN GRINDING-MILLS.

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Be it known that I, JOHN DONALDSON, of the city of Rockforthin the county of Winnebago, and State of Illinois, have invented a new and useful Hominy Mill; and I do hereby declare that the following is a full, clear, and exact description of Vthe same, reference being lhad to the annexed drawing forming part of this specification, and to the letters of 'reference marked thereon. In the drawing- Figure 1 is an end elevation of the power endV of the machine.-

Figure 2 shows the opposite end of the machine from iig. 1.

Figure 3 shows an end view of the feed-valve P and its operating levers.

Figure 4 shows the hopper S and feed-valve P.

My invention has reference to the making of hominy from corn,and consists of certa-in combinations 'rf devices hereinafter to be set forth.

In the drawing, T T show the main supports of the machinery. L is the driving-pulley, turning the hulling'rnaehinery, attached to the same shaft, by any convenient power. S is the hopper', receiving the corn, which is let 4into the hulling device by the valve P, gs. 1 and 3, as hereafter described. On the same shaft with the pulley L, but onA the opposite end, fig. 2, is the pinion C, which gives motion to the spur-wheel A, which in turn gives motion to the pinion B, driving the fan' K. To thc wrist-pin d, upon the spur-wheel A, is secured thc shake-rod V, which, connecting with the sie s I, by the levcr g, gives a reciprocating motion to the sicves, iig'. 2. On the-same shaft with spur-wheel A, but on the opposite cnil, is secured the bevel pinion N, which meshes into the bevel-wheel N. Upon the same shaft with bevel-wheel N is the screw or warmer D, which gives motion to the wheel E, moving loosely upon the same shaft as pulley L, fig. 1. In the opposite arms of wheel E are the slotted openings ifi', in which are secured the adjustable pins or studs which give motion to the feed-lever a, and discharge-lever a. The lever a is cogged on its lupper end, and meshes into the cogs of thelvalve-lever l, secured to the same shaft as feed-valve P.

In this invention particular attention is asked to the following points:

First. The pinion C, being secured to the same shaft as the driving-pulley L and the hulling-cylinder, will always have a proportional motion to the hulling machinery. This pinion C meshes into the spur-wheel A, which, by means of the wrist-pin 0l and shake-rod V, gives a regular reciprocating motion to the sievcs I. This spur-wheel A also gives motion to the fan K, bymcans of the pinion B. It will be'obscrved that the motion of the sieves I and fan K are both positive, and always proportional to the speed of the hulling machinery.

Second. The hevel-wheel N and Wormer D, both upon the same shaft, give a steady and fixed motion to the worm-wheel E, and, by meansof the adjustable pins in the slots t' a regular intermittent motion to the feedvalv'e P and discharge-valve, fastened to the same shaft as lever a.

Third. By means ofthe adjustable pins, secured in the slots z' of the wheel E, as hercinbefore described,

the feed and discharge-valves are held open a longer or shorter interval at each revolution of thc whccl E, in

proportion as these pins or studs are moved outward toward the circumference of said wheel, or inward toward its centre,- which adjustment of the. amount of grain let into the hulling machinery has been found necessary to accommodate for the difference of power applied to the machine, enabling any amount of power to be applied less than its full capacity, and at the same time the feed being reduced will permit the machinery to run at the proper speed.

Fourth. It will be observed that feed-valve I opens upward, and therefore has the weight of-'the corn to assist in closing it and holding it closed, a great improvement over my former plan of opening this valve downward. The cogged levers a and l, and spring n, operating as described, give a very certain and satisfactory motion to the feeding device.

Fifth. Thefeed-valve P, g. 8', is bent downward on its outer edge, coming into the groove It, in the bedpiece of the hopperS. This curved or tongue shape of valve I, and recess or groove It, insure the valve vagainst leakage between the intervals of being raised. This security against leaking has been found of great advantage in the operation of hominy making, as no grain ought to get into thc batch, when oncc let in, I until completed.

Having thus described my machine, what I claim as my present invention, and desire to secure by Letters Patent, is-

1. The arrangement of the slots iz", in wheel E, with the pins, adjustable in said slots, and the feed-levers a and I, and dischnrgcdever a, operating in connection with the feed and discl1arge-valves, und the hulling machinery, substantially as described and for the purpose set forth.

2.'The arrangement and construction of the feed-valve I and groove R in hopper S, substantially as described.

In testimony whei'eofI have hereunto set my name in the presence of two subscribing witnesses.

JOHN DONALDSON.

Witnesses:

Fans. D. CAMMANN A. E. BALL. 

